Car heater



Jafi 6, 1931. J, HEYwARD 1,787,904

CAR HEATER Filed May 2. 1927 I i ll a/ INVENTOR.

76 470036 J. 1733 w ll-l.

Patented Jan. 6, 1931 UNITED STATES FRANCIS J. HEYWABD, OF DETROIT, MICHIGAN CAB HEATER Application filed May 2,

My invention relates to a new and useful improvement in a car heater, adapted primarily for use with vehicles of the automotive type in which the exhausted gases are I discharged and adapted for use in heating air for delivery to the car. The invention also relates to the specific form of tube or conduit which I have illustrated in my invention adapted for conducting air as shown 10 in the specification or when used for other purposes.

It is an object of the present invention to provide a device of this class which will a be simple in structure, economical of manufacture and highly efiicient in use.

Another object of the invention is to provide a heater in which the atmospheric air may be led around the exhaust pipe and delivered into the interior of the vehicle for heating purposes.

Another object of the invention is the provision of a conduit which may be interposed in the exhaust pipe and serve to retard exhaust. gases and the passage of air delivered around the same so as to effect a maximum heating.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of parts hereinafter described and claimed.

The invention will be best understood by a reference to the accompanying drawings which form a part of this specification and in which,

Fig. 1 is a fragmentary side elevational view of a vehicle showing the invention applied.

F ig. 2 is a central vertical sectional view of the tube used in the invention showing it applied.

Fig. 3 is a perspective-view of the tube used in the invention.

Fig. 4; is a sectional view taken on line 4-4 of Fig. 2. I n

Fig. 5 is a fragmentary central vertical sectional view of the receiying end of the device.

In the drawings-I have illustrated the invention adapted for use with a vehicle having an internal combustion engine 9 and provided m with a radiator 10 and a fan 11 for drawing 1927. sem m. 188,238.

the air through the radiator. The engine 9is adapted to exhaust the burnedgase's throu h the exhaust pipel12 and through the, m or 13. Interposed in the exhaust pipe 12 be: tween the engine and the mufiler 13 is a special tubing 14%. This tube is originally cylin-v drical and at spaced intervals the tube is compressed as atl? preferably at diametrically o posite points. Similar compressions 16 are e ected intermediate the compressions at a different angle rotatable about the axis of the tube 14;, so that the pockets or depress'mns formed in compressing the tube 14.- are in staggered relation. In the form shown in the drawingsI have made these compressions in a stag er of 180 degrees. The tube 14 is connecte to the muflier-13 at one end, and its 0 posite end is expanded andprovided with t e. split 17 which embraces the exhaust pipe 12 and is clamped securely thereon by a clamp 18. Adjacent each end of the tube 14 is a circumferential groove. 19 about which is clamped the compressed end 20 by means of a suitable clamping member 21, such as wire or the like, of a housing 22, this housing 22 com- 75 municating at one end by the pipe 23 with a funnel 24whichispositionedrearwardlyofthe fan 11 and provided with a screen 25 held in position by the ring 26 and the ring 27. The opposite end of the housing 22 communicates through the pipe 28 with a re 'ster 29 which is positioned in the floor 30 o the car body. In operation, when the engine is run, the fan 11 being rotated, will force the air rear"- wardly through the pipe 23 into the housing 22 through which it issues through the pipe 28 to the register 29. It will be noted that the original outside diameter of the pipe 14 is substantially the same as the inside diameter of the housing 22, so that the air driven into the housing 22 through the pipe 23 is forced to follow the passage formed in the depressions in the pi'pe. This formation of the tube serves to retard the passage of the air through the housing, so that a'maximum heating 1s effected.

Furthermore, the passage of the exhaust gases through the tube 14 is also retarded on account of the formation of the tube as shown in Fig. 4. The boreof the tube when the de- 10! ressions are made at 180 degrees, as described, W111 comprise a square 31. The ex-. haust ases forced throu h this tube will strike t e end walls 32 of t e depressions and 5 thus will be retarded and deflected, so that the exhaust gases will be brought into contact with a maximum'inner surface of the tube 14.

It is believed evident that the tube 14 constructed as described may be utilized for varia ous purposes in which retarding and deflectin of various gases is desired.

@Vhile I have illustrated and described the preferred form of my invention, I do not wish to limit myself to the precise details of struc- 15 ture shown, but desire to avail myself of such variations. and modifications as come within the scope of the appended claims. I 7

Having thus described my invention what I claim as new and desire to secure by Letters go .Patent is:

' In a car heater of the class described, a housing; and a tubular member positioned within said housin said tubular member being pressed'inwar 1y from opposite sides at 25 spaced intervals to form peripheral depress1ons thereon and constricted diametrically thereof, said tubular member being formed substantially rectangular in cross section at said constricted portions and snugly enga ing 30 the inner surface of said housing at each o the end walls of said constricted portions,- said de ressions being in staggered relation circumgrentially of said tubular member.

In testimony whereof I have signed the .35 foregoing specification. FRANGISJ. HEYWARD. 

